How to find the value of a missing measurement: Pythagorean Theorem.

For example, in this right triangle, where the value of a is 3, c is 6, and b is an unknown value.
32 + b2 = 62

32 =9, and 62 =36

So now we know that 9 + b2 = 36. To find the value of b2 we can subtract 9 from 36.

36-9 = 27

The square root of 27 is roughly 5.2. Therefore, we know that b=5.2.

We can check that this is right by using the completeted Pythagorean Theorem.

9 + 27 = 36 This is correct.

Here is a video to conclude this lesson. It may help clear up some problems that I can't.

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How to find the value of a missing measurement: Pythagorean Theorem.